NCLOB

NCLOB (National Character Large Object) is an Oracle data type that can hold up to 4 GB of character data. It's similar to a CLOB, but characters are from the national character set.
In 12c, the storage limit is extended to (4*1024*1024*1024-1) * CHUNK size given in the LOB STORAGE clause defining the LOB (database block size by default).

Examples

CREATE TABLE t1(c1 NCLOB);

INSERT INTO t1 VALUES( N'any nchar literal' );

Also see

• CLOB - similar to NCLOB, but for characters from database character set
• NVARCHAR2